Anything is better than nothing. But I use the use that cover the box and everything. Where the knot normal one ends at both sides is the weakest point. It "scissors" the wire there. I wa doing good for a year or so and then lost 3 tt15s to broken wires in 2 weeks. The guys I hunted with in Oz used the firehosue covers. It was the best i have seen but they used the non shockers.
I use these and do well. But they will still break with them.
https://hogdoggear.com/collections/cut-collars/products/elite-cut-collar
